Fix Pin::set bounds regression · patricklam/verify-rust-std@927a6da (original) (raw)
`@@ -1370,7 +1370,15 @@ impl<Ptr: Deref> Pin {
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`// SAFETY: see documentation on this function
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`unsafe { Pin::new_unchecked(&*self.__pointer) }
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`}
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}
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// These methods being in a Ptr: DerefMut impl block concerns semver stability.
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// Currently, calling e.g. .set() on a Pin<&T> sees that Ptr: DerefMut
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// doesn't hold, and goes to check for a .set() method on T. But, if the
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// where Ptr: DerefMut bound is moved to the method, rustc sees the impl block
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// as a valid candidate, and doesn't go on to check other candidates when it
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// sees that the bound on the method.
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impl<Ptr: DerefMut> Pin {
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`` /// Gets a mutable reference to the pinned value this Pin<Ptr> points to.
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`///
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`` /// This is a generic method to go from &mut Pin<Pointer<T>> to Pin<&mut T>.
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`@@ -1402,10 +1410,7 @@ impl<Ptr: Deref> Pin {
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```` /// ```
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`#[stable(feature = "pin", since = "1.33.0")]
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`#[inline(always)]
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`-
pub fn as_mut(&mut self) -> Pin<&mut Ptr::Target>
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where
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`-
Ptr: DerefMut,
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{
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pub fn as_mut(&mut self) -> Pin<&mut Ptr::Target> {
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`// SAFETY: see documentation on this function
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`unsafe { Pin::new_unchecked(&mut *self.__pointer) }
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`}
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`@@ -1420,10 +1425,7 @@ impl<Ptr: Deref> Pin {
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`#[unstable(feature = "pin_deref_mut", issue = "86918")]
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`` #[must_use = "self will be dropped if the result is not used"]
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`#[inline(always)]
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`-
pub fn as_deref_mut(self: Pin<&mut Pin>) -> Pin<&mut Ptr::Target>
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where
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Ptr: DerefMut,
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{
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pub fn as_deref_mut(self: Pin<&mut Pin>) -> Pin<&mut Ptr::Target> {
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`// SAFETY: What we're asserting here is that going from
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`//
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`// Pin<&mut Pin>
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`@@ -1475,12 +1477,13 @@ impl<Ptr: Deref> Pin {
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`#[inline(always)]
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`pub fn set(&mut self, value: Ptr::Target)
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`where
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Ptr: DerefMut,
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`Ptr::Target: Sized,
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`{
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`*(self.__pointer) = value;
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`}
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}
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``
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impl<Ptr: Deref> Pin {
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`` /// Unwraps this Pin<Ptr>, returning the underlying Ptr.
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`///
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`/// # Safety
`